How to execute differnet import.sql in Hibernate/J

问题:

I have configured two persistence units in my JPA/Hibernate configuration. Now i need to execute different import.sql for each persistence unit. How can I specify which import.sql should be executed for each persistence unit? According Hibernate to documentation, I should place import.sql in classpath. If I do that, import.sql is executed on each persistence unit. I need somehow to specify different import.sql for each persistence unit.

回答1:

You could probably do something manual using the org.hibernate.tool.hbm2ddl.SchemaExport class when your application starts up.

SchemaExport schemaExport1 = new SchemaExport(cfg1); // there are various c-tors available
schemaExport1.setInputFile("/import-1.sql");
schemaExport1.create(false, true);

SchemaExport schemaExport2 = new SchemaExport(cfg2);
schemaExport2.setInputFile("/import-2.sql");
schemaExport2.create(false, true);

回答2:

FWIW, this is possible with Hibernate 3.6.0.Beta1 (see HHH-5337), you can now declare what file(s) to import using the hibernate.hbm2ddl.import_files property:

hibernate.hbm2ddl.import_files /mydbload.sql,/mydbload2.sql

So you could use different values for each persistence unit.

回答3:

In all my projects, i use only one import.sql and next to it i create different other *.sql(eg : H2_import.sql,sqlServer_import.sql) and depending on wich persistence unit to use i copy the content of *.sql and past it into import.sql